Geoege baldwin



(No Model.)

, G. BALDWIN. TENSION REGULATING DEVICE FOR LOOM' SHUTTLES. No. 291,831.. Patented Jan. 8, 1884.

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' NITED 'rnrns ATENT Prion.

GEORGE BALDlVIN, OF BUCKLAND, CONNECTICUT, ASSIGNOR OF ONE-HALF TO THOMAS CLARK, OF SAME PLACE.

TENSION- REGULATiNG DEVICE FOR LOOM-SHUTTLES.

SPECIFICATION forming part of Letters Patent No. 291,831, dated January 8, 1884.

Application filed October 5, 1882.

I all whom, it may concern:

Be it known that I, GEORGE BALDWIN, of Buckland, in the county of Hartford and State of Connecticut, have invented a certain 'new andusefulImprovementinTension-Regulating Devices for Loom-Shuttles, of which the following is a description, reference being had to the accompanying drawings, where Figure 1 is a top view of a loom-shuttle with my improvement attached. Fig. 2-is a view of that end of the shuttle which contains the tension-regulating device in central longitudinal section. Fig. 3 is a view of the shuttle in cross-section along the longitudinal cen- 1 ter of the gravity-roll, denoted by the dotted line 00 w of Fig. 1. Fig. 4 is a detail sectional view on the dotted line y g of Fig. 1.

The letter (t denotes the shuttle-body. I) denotes a bobbin. cdenotes the spindle for supporting the bobbin, and (1 denotes the thread. The thread between the bobbin and the hole by which it escapes from the shuttle, passes under the roll 6 which lies upon the thread, its gravity being relied upon to give the proper pressure, for which reason I term this roll a gravityroll. It is the pressure of this gravity-roll upon the thread, with a suitable bed underneath of course, which gives the thread the proper tension. The gravity-roll 0 is provided with trunnions f, one of which (being screwed into the end of the roll) is removable, leaving a hole in the end of the roll, through which shot can be introduced into the (No model.)

hollow interior of the roll, so as to give it the proper gravity and to adjust the amount of 5 that gravity. These trunnions project each of them into a case formed on each side with a slot, 9, which is first vertical, and then at the top runs off horizontally or laterally, from which circumstance I term these slots the angular slots. The purpose of the vertical part of the slots is of course to permit the gravity-roll to press freely upon the thread. The purpose of the horizontal or lateral part of the slots is to support the roll a when it is placed or thrown therein. By a single quick motion of the shuttle in the operators hand,

he may throw the roll up and into the horizontal portions of the slots, so that its trunnion will lie in the horizontal part, thus keeping the roll out of the way while the operator is threading the shuttle.

I claim as my improvement 1. A hollow tension-roll provided with an opening for the insertion and removal of 5 5 weights, in combination with a shuttle-body having sockets for the reception of the roll, substantially as and for the purposes set forth.

2. The hollow gravity tension-roll provided with a removable trunnion, substantially as described, and for the purpose set forth.

GEORGE BALDWIN.

\Vitnesses:

WALTER H. BUNCE, A. C. TANNER. 

